You should do the quests for the red sunset staff (talk to sentry kendall) and then later the quest for the staff of sentinel. That's really the best way to improve your weapon and raise wealth at the same time. You will get more healing potions than you'll even want to carry, plus lots of spiritshots.
You'll do best to use the exchange system to upgrade (this is assuming your character is the novice character for your account on the server)
For armor you should strive to upgrade to the devotion set for your robes, and upgrade your weapon as best as you can afford.
At this point, working Herbiel's spore-fungus quest is a good idea. ;)
level 13
1 into weapon mastery (all it would let me)
level 3 wind strike (all it would let me)
level 2 ice bolt (all it would let me)
level 1 shield (all it would let me)
level 1 might (all it would let me)
level 13
1 into weapon mastery (all it would let me)
level 3 wind strike (all it would let me)
level 2 ice bolt (all it would let me)
level 1 shield (all it would let me)
level 1 might (all it would let me)
SP left - like 2k
Sounds good to me. Seriously though, don't worry to much about "wasting" skill points at lower lvls. I just spent 9.5 millioin skill points on my new skills. So you will always be getting skill points.
As you get higher... let's say once you get to 20, then you might want to ask because some of the skills might not be needed. For instance, at 20 you get 2 summons, one of them can regen your mana. If you are not going Summoner at 40 then you might not be interested in them but might just want to get the one that recharges some of your mana.